Machine for molding concrete or cement building-blocks.



UNITED STATES JOHN WM. TINSTMAN,

Patented November 1, 1904.

OF BUTLER, INDIANA.

MACHINE FOR MOLDING CONCRETE OR CEMENT BUILDING-BLOCKS.

SPECIFICATION forming part of Letters Patent N0. 774,007, dated November 1, 1904.

Application led June 15, 1904.

To all whom, it may concern.-

Be it known that I, JOHN WM. TINSTMAN, a citizen ot' the United States, residing at Butler, county of Dekalb, and State of Indiana, have invented certain new and useful'Im provements in Machines for Molding Concrete or Cement Building-Blocks, of which the following is aspeciication.

My invention relates to machines for molding concrete or cement building-blocks.

Machines for accomplishing the molding of concrete or cement building-blocks have heretofore been more or less expensive, large, and oi' several parts.

The object ofl the present invention is the provision oi' an improved, inexpensive, and simple machine for molding cement and concrete building-blocks which can be quickly and easily manipulated and wherein novel provision is made for forming any desired design on the sides of the blockbeing molded.

The invention `also contemplates the prol vision of an improved and simple core which can be quickly and easily removed from the molded block without injuring the block.

The invention carries out its contemplated objects, according to the most perfect embodiment of the device which I have at this time conceived, by the provision of a base on which the building-block is to be molded, a mold-box consisting of an open frame comprising sides and ends suitably hinged together, so' that any side or end can be removed and another with a different design substituted, if desired, said frame or boxV being arranged to be opened out after the block has been molded and having means for holding the frame togetherl when in use, and a core having means for raising the same from the molded block at a plurality of points, so that it is extracted evenly, and thus tearing of the block is obviated.

In the accompanying drawings, Figure l is Serial No. 212,602. (No model.)

bench or trestle at a suitable height for convenient operation of the device by the workman. l

The moldbox or frame 2 is composed of ends and sides connected by two hinges 3 and 4'at each corner, except where the latch-or fastening 5 is provided. The hinges 3 and 4 at each corner of the Jframe 2 have their pivotal parts in vertical alinement, and a removable pintle 6 passes through both upper and lower hinges. This construction gives strength and at the same time permits rapid and easy detachment of the leaves of the hinges, so that any side or end of the frame can be removed and replaced by another when it is desired to substitute a side or end having a different design or configuration, for it will be understood that the sides and ends may or may not be provided with designs or contigurations on their inner faces to mold corresponding designs on the faces of the building-block. Suitable handles 7 are provided for the manipulation of the mold-box. It will be seen that by unlatching the fastener 5 the mold-box can be spread open, as shown in Fig. 3', Vafter the block has been molded A to thus free the block. n

The core Scan beL madehollow or solid, as preferred, and is of suitable size to make the desired opening in the building-block. This core has parallel openings extending therethrough lfrom top to bottom through which loosely pass the legs 9 and lO of a liftingframe, said legs being connected by a crosspiece 11.

The numeral l2 designates a turn ing-handle to which is secured a screw 13, having a shoulder or nut 14, secured rigidly thereon, which bears against the cross-piece 11, while the screw 13 passes loosely through a hole in the cross-piece 11 and is detachably engaged by screw-threads with an internally-threaded nut 15, secured -to the core 8. By turning the handle 12 the legs 9 and l0, which bear against the base l, are made to form a support for the elevation thereon of the core`8, whereby the core is elevated out of the building-block until it is free therefrom, after which it can be lifted'out bodily, and it will be understood that the provision of the plurality 'of support- IOO ing-legs evenly distributes the pressure, so

that there is no tilting of the core when being r withdrawn, and hence the building-block is not injured. By turning the handle 12 the screw 13 turns in the screw-plate 15 and the core 8 is drawn up on the legs 9 and 10.

In using the invention the base 1 is suitably supported on a trestle or other support at the proper height. The mold frame or box 2 is then placed on the base and the core 8 is positioned within the mold-box, Ythe parts then having the relation shown in Fig. 1. The cement or concrete is then filled in the mold-box around the core and tamped down and smoothed oi" on top. The handle 12 is next operated to withdraw the core, after which the latch 5 is released and the frame straightened out, as shown in Fig. 3, and then placed aside, which leaves the completed buildingblock on the base 1. The base 1, with the building-block thereon, is then removed to some suitable place to harden, and a duplicate base 1 is used to mold another block according to the foregoing operation. When it is desired to make any desired configuration or impression on the side or end of the molded block, the given side or end is removed by taking out the pintles from the hinges and the desired end or side is substituted.

Having thus described my invention, what I claim as new, -and desire to secure by Letters Patent, is-

1. In a machine for molding blocks, the combination with a solid base, of a mold box or frame adapted to seat thereon, aoore adapted to rest on said base within said frame, and means carried wholly by the core and extending therethrough, said means adapted to engage said base whereby the core is raised therefrom.

2. In a machine for molding blocks, the conn bination with a solid base, of a mold box or frame adapted to rest thereon, a core adapted to rest on said base within the frame, legs passing through the core adapted to engage the base, and means cooperating with said legswhereby they are forced into engagement with the base to raise the core.

3. In amachine for molding blocks, the cornbination with a solid base, of a mold box or frame adapted to rest thereon, a core adapted to rest on said base within the frame, legs passing through the core adapted to engage the base, and a screw threaded in the core and cooperating with said legs whereby the core is raised from the base.

4. In a machine for molding blocks, the combination with a solid base, of a mold box or frame adapted to rest on said base, a core having an aperture adapted to rest on said base within the frame, a plurality of legs passing through said core and connected by a crosspiece, a threaded plate secured to the core and covering said aperture, and a hand-screw journaled in the cross-piece and screwing into said plate, whereby the legs are forced into engagement with the base to raise the core.

In testimony whereof I hereunto alx my signature in presence of two witnesses.

JOHN WM. TINSTMAN.

Witnesses W. S. MAXWELL, THOMAS RUDD. 

